5.7 with 4l80e in 1969 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gjmath01 · 07-17-2014, 11:55 PM

Im looking for some info.i have read around and seen many different ideas and opinions. .I have a 69 swb stepside nothing under the hood.my question is other then the engine tranny an computer what else do I need under the hood from donor truck? I have a 98 3500 im taking the 5.7 with 4l80e tranny with comp from it to put in the 69 because I already have the truck and dont need to buy a engine and tranny.does anyone know what column I can use to swap from the 3on the tree?Also any idea on the whole anti theft stuff since I wont be using the same key and ignition?

Bigdav160 · 07-18-2014, 08:10 AM

I don't remember that body style having anti-theft.

67 chevelle · 07-18-2014, 08:52 AM

get the radiator fans and relays

hugger6933 · 07-18-2014, 11:43 AM

The 98 still had engine driven fans. The 98 didn't have a theft deterrent module of any kind that i can remember or lots of people know it as pass key for the recovering Camaro crowd. I would imagine that the same guys that rewire the LS harnesses for the locals to you can redo the factory Vortec harness to get rid of a bunch of unneeded stuff for you. If your not aware of anyone local I know one guy I would trust with anything wiring on a motor. John Spears at Speartech. He is in IN and does what he says when he says he will do it and for the money he says he will do it for. I am sure that there are other that will do just as good but he did a 6.0 4L80E harness for me long time ago before it became stylish. Jim

gjmath01 · 07-18-2014, 12:34 PM

Thanks fellas ..Yes it has engine fan on the 98's and as for the anti theft stuff its not the chiped keys it the kind that remembers the key with the ignition.when I changed the ignition amd key a few years ago it wouldn't start so I had to reprogram it by turning key off and on and let sit.i couldn't find any info on how the swap would work without that..any idea on the column swap?

Bigdav160 · 07-18-2014, 12:47 PM

I just read that 1998 was the first year for Passlock in the trucks. IIRC, this system "marries" the lock cylinder to the PCM. There is a hall effect sensor in the lock cylinder that has to see a key rotate to start.

I'm sure this system can be defeated pretty easily. Do a search

07-17-2014, 11:55 PM	#1
gjmath01 Registered User Join Date: Jun 2014 Location: new orleans Posts: 9	5.7 with 4l80e in 1969 Im looking for some info.i have read around and seen many different ideas and opinions. .I have a 69 swb stepside nothing under the hood.my question is other then the engine tranny an computer what else do I need under the hood from donor truck? I have a 98 3500 im taking the 5.7 with 4l80e tranny with comp from it to put in the 69 because I already have the truck and dont need to buy a engine and tranny.does anyone know what column I can use to swap from the 3on the tree?Also any idea on the whole anti theft stuff since I wont be using the same key and ignition?

07-18-2014, 08:10 AM	#2
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 5.7 with 4l80e in 1969 I don't remember that body style having anti-theft. __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

07-18-2014, 08:52 AM	#3
67 chevelle Registered User Join Date: May 2013 Location: WEST PALM FLORIDA Posts: 1,174	Re: 5.7 with 4l80e in 1969 get the radiator fans and relays __________________ 68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive

07-18-2014, 11:43 AM	#4
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,280	Re: 5.7 with 4l80e in 1969 The 98 still had engine driven fans. The 98 didn't have a theft deterrent module of any kind that i can remember or lots of people know it as pass key for the recovering Camaro crowd. I would imagine that the same guys that rewire the LS harnesses for the locals to you can redo the factory Vortec harness to get rid of a bunch of unneeded stuff for you. If your not aware of anyone local I know one guy I would trust with anything wiring on a motor. John Spears at Speartech. He is in IN and does what he says when he says he will do it and for the money he says he will do it for. I am sure that there are other that will do just as good but he did a 6.0 4L80E harness for me long time ago before it became stylish. Jim

07-18-2014, 12:34 PM	#5
gjmath01 Registered User Join Date: Jun 2014 Location: new orleans Posts: 9	Re: 5.7 with 4l80e in 1969 Thanks fellas ..Yes it has engine fan on the 98's and as for the anti theft stuff its not the chiped keys it the kind that remembers the key with the ignition.when I changed the ignition amd key a few years ago it wouldn't start so I had to reprogram it by turning key off and on and let sit.i couldn't find any info on how the swap would work without that..any idea on the column swap?

07-18-2014, 12:47 PM	#6
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 5.7 with 4l80e in 1969 I just read that 1998 was the first year for Passlock in the trucks. IIRC, this system "marries" the lock cylinder to the PCM. There is a hall effect sensor in the lock cylinder that has to see a key rotate to start. I'm sure this system can be defeated pretty easily. Do a search __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe



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